Wiki indicates otherwise, so might want to be careful. May be a case of not currently operating as intended in SMP or might take specific closer placement than say lava / burning stump to actually ignite.

__________________Cheers......Thermal IonsAlthough the scythe isn't pre-eminent among the weapons of war, anyone who has been on the wrong end of, say, a peasants' revolt will know that in skilled hands it is fearsome. -- (Terry Pratchett, Mort)